Mon Sep 18 12:39:22 1995 Paul Eggert <eggert@twinsun.com>

	* mktime.c (localtime_r): Add substitute if the system doesn't
	provide one.

Mon Sep 18 14:39:20 1995  Roland McGrath  <roland@churchy.gnu.ai.mit.edu>

	* time/gmtime.c (gmtime_r): Define as weak alias.
	* time/localtime.c (localtime_r): Define as weak alias.
	* time/time.h [__USE_REENTRANT] (gmtime_r, localtime_r): Declare them.

	* errno.h: Only define _ERRNO_H #ifndef __need_Emath.
	#undef __need_Emath after including errnos.h.
	[_ERRNO_H]: Protect decls with this.

Sun Sep 17 08:22:12 1995  Paul Eggert  <eggert@twinsun.com>

	Fix mktime so that it does not write over localtime's returned value.
	* localtime.c (__localtime_r): New function, with extra arg
	specifying where to store result.
	(localtime): Use it.
	(_tmbuf): New var.
	* gmtime.c (__gmtime_r, gmtime, _tmbuf): Likewise.
	* mktime.c (__mktime_internal):	Conversion function is now
	__localtime_r style, not localtime style.
	(mktime): Pass __localtime_r, not localtime.
	* timegm.c (timegm): Pass __gmtime_r, not gmtime.
	* offtime.c (__offtime): New arg specifying where to store result.
	* time.h (__mktime_internal, __offtime): Adjust decls accordingly.
	(__gmtime_r, __localtime_r): New decls.

	* time/localtime.c: <stddef.h>, <ctype.h>, <stdio.h>,
	<stdlib.h>, <string.h>: Remove includes.
	<errno.h>: Add include.

	* time/mktime.c, time/time.h, time/timegm.c (__mktime_internal):
	Renamed from _mktime_internal to avoid namespace pollution.

	* time/gmtime.c: Clear tm_isdst.

	* misc/efgcvt_r.c (ecvt_r, fcvt_r): Last arg is size_t, not int.
	* stdlib/stdlib.h (ecvt_r, fcvt_r): Fix type of last arg: make it
	size_t.

	* sysdeps/mach/hurd/fpathconf.c: Call __io_pathconf instead of
	__file_pathconf.
	* sysdeps/mach/hurd/pathconf.c: Likewise.

1 files changed, 17 insertions, 11 deletions

diff --git a/time/localtime.c b/time/localtime.c
index 5743347..4c68ab2 100644
--- a/time/localtime.c
+++ b/time/localtime.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1991, 1992, 1993 Free Software Foundation, Inc.
+/* Copyright (C) 1991, 1992, 1993, 1995 Free Software Foundation, Inc.
 This file is part of the GNU C Library.
 
 The GNU C Library is free software; you can redistribute it and/or
@@ -16,24 +16,29 @@ License along with the GNU C Library; see the file COPYING.LIB.  If
 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
 Cambridge, MA 02139, USA.  */
 
-#include <stddef.h>
-#include <ctype.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
+#include <errno.h>
 #include <time.h>
 
+/* The C Standard says that localtime and gmtime return the same pointer.  */
+struct tm _tmbuf;
 
 /* Return the `struct tm' representation of *TIMER in the local timezone.  */
 struct tm *
 localtime (timer)
      const time_t *timer;
 {
+  return __localtime_r (timer, &_tmbuf);
+}
+
+struct tm *
+__localtime_r (timer, tp)
+     const time_t *timer;
+     struct tm *tp;
+{
   extern int __use_tzfile;
   extern int __tz_compute __P ((time_t timer, struct tm *tp));
   extern int __tzfile_compute __P ((time_t timer,
 				    long int *leap_correct, int *leap_hit));
-  register struct tm *tp;
   long int leap_correction;
   int leap_extra_secs;
 
@@ -57,21 +62,22 @@ localtime (timer)
     }
   else
     {
-      tp = gmtime (timer);
-      if (tp == NULL)
+      struct tm *gmtp = __gmtime_r (timer, tp);
+      if (gmtp == NULL)
 	return NULL;
 
-      if (! __tz_compute (*timer, tp))
+      if (! __tz_compute (*timer, gmtp))
 	return NULL;
 
       leap_correction = 0L;
       leap_extra_secs = 0;
     }
 
-  tp = __offtime (timer, __timezone - leap_correction);
+  __offtime (timer, __timezone - leap_correction, tp);
   tp->tm_sec += leap_extra_secs;
   tp->tm_isdst = __daylight;
   tp->tm_gmtoff = __timezone;
   tp->tm_zone = __tzname[__daylight];
   return tp;
 }
+weak_alias (__localtime_r, localtime_r)